John Deere S120Lawn Tractor
Riding (Lawn Tractor) mower · Model S120 · Prosumer-duty · Gas
The John Deere S120Lawn Tractor is a prosumer-grade gas lawn tractor, built for large residential properties and acreage, with a 42-inch deck and a 724.3cc engine making 22 hp. It weighs 444 lb (201.4 kg).
At a glance
Engine
| Power Source | gas |
|---|---|
| Displacement | 44.2 ci (724.3 cc) |
| Engine Power | 22 hp |
| Cylinders | 2 |
| Engine Model | 44N677 (M44) |
| Fuel Type | Gasoline |
Deck
| Cutting Width | 42 in (1067 mm) |
|---|---|
| Min Cut Height | 1 in (25 mm) |
| Max Cut Height | 4 in (102 mm) |
| Deck Material | Steel, 13 gauge0.090 in.2.3 mm |
| Deck Construction | Stamped steel deck shell |
| Deck Gauge | 13 |
| Discharge | Side discharge |
Drive
| Transmission | Hydrostatic, 2-wheel drive |
|---|---|
| Ground Speed | 5.5 mph |
| Drive Tire Size | 20x8-8 |
| Drive System | Manual power take-off (PTO) |
| Reverse Speed | 3.2 mph |
Dimensions
| Weight | 444 lbs (201.4 kg) |
|---|---|
| Fuel Capacity | 2.4 gal (9.1 L) |
| Length | 69.7 in (1770 mm) |
| Width | 55.2 in (1402 mm) |
| Height | 44 in (1118 mm) |
Commercial / Pro
| Frame Construction | Full-length welded steel |
|---|---|
| Seat Type | Two-piece with open-back |
General
| Bagger Capacity | 6.5 bu (229 L) |
|---|---|
| Warranty | 2 yr |
Productivity & acreage
S120Lawn Tractor deck width, ground speed and computed acres-per-hour, from the specs we have. Duty class: Prosumer — A higher-capacity homeowner machine for larger properties and acreage.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 42 in |
|---|---|
| Engine make | not specified by manufacturer |
| Engine displacement | 724.3082288 cc |
| Engine power | 22 hp |
| Transmission | Hydrostatic, 2-wheel drive |
| Drive type | not specified by manufacturer |
| Ground speed | 5.5 mph |
| Cut-height range | 25 mm – 102 mm |
| Fuel capacity | 9.1 L |
| Weight | 201.4 kg |
| Warranty | 2 |
| Commercial warranty | not specified by manufacturer |
| Deck construction | Stamped steel deck shell |
| Deck gauge | 13 ga |
| Spindle type | not specified by manufacturer |
| Frame construction | Full-length welded steel |
| Anti-scalp rollers | not specified by manufacturer |
| Drive tire size | 20x8-8 |
| Seat type | Two-piece with open-back |
| Dealer network | not specified by manufacturer |
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Similar models
Other riding (lawn tractor) mowers with comparable specs — including other brands — that buyers cross-shop with the S120Lawn Tractor.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — deere.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
Source: John Deere (manufacturer) · archived copy